valgrind.supp: remove library version from suppression

glibc installs the library /usr/lib/ld-?.??.so with its version.  Wildcard
this so the suppresses the warning for all glibc versions.

Signed-off-by: Allan McRae <allan@archlinux.org>

valgrind.supp

@@ -164,6 +164,6 @@
    obj:/usr/lib/libfakeroot/fakechroot/libfakechroot.so
    fun:call_init.part.0
    fun:_dl_init
-   obj:/usr/lib/ld-2.20.so
+   obj:/usr/lib/ld-*.so
    ...
 }